class Shuffle {
  public static void main(String[]args){
  
    int x = 3;
    while( x > 0){
    if (x>2){
      System.out.print("a");
    }
    x = x - 1;
    System.out.print("-");
    if (x == 2 ) {
      System.out.print("b c");

    }
    if ( x ==1){
    System.out.print("d");
    x = x - 1;
    }
  }
  }
}
